Buckle



FIG. 1 is a perspective view of a buckle showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right side elevational view thereof, the left side being a mirror image of that shown; and,

FIG. 7 is a perspective view embodying the utilization of my new design, the suitcase and the straps depicted by means of broken lines being for illustrative purposes only and forming no part of the claimed design. 

The ornamental design for a buckle, as shown and described. 